The fund's return may not match the return of the Nasdaq Dorsey Wright DALI1 Index.  Securities held by the fund will generally not be bought or sold in response to market fluctuations.

The fund's shares will change in value and you could lose money by investing in the fund. One of the principal risks of investing in the fund is market risk. Market risk is the risk that a particular security owned by the fund, fund shares or securities in general may fall in value. There can be no assurance that the fund's investment objective will be achieved. The outbreak of the respiratory disease designated as COVID-19 in December 2019 has caused significant volatility and declines in global financial markets, which have caused losses for investors. The COVID-19 pandemic may last for an extended period of time, and will continue to impact the economy for the foreseeable future.

The fund may be concentrated in a small number of ETFs (including a single ETF). The ETFs may invest in securities issued by companies concentrated in a particular industry or sector which involves additional risks including limited diversification.

Certain ETFs invest in volatile securities. Frequent or significant short-term price movement may adversely impact the performance of the fund.

The fund is classified as "non-diversified" and may invest a relatively high percentage of its assets in a limited number of issuers. As a result, the fund may be more susceptible to a single adverse economic or regulatory occurrence affecting one or more of these issuers, experience increased volatility and be highly concentrated in certain issuers.

The fund may own a significant portion of the ETFs included in the index. Any such ETF may be removed from the index in the event that it does not comply with the eligibility requirements of the index. As a result, the fund may be forced to sell shares of certain ETFs at inopportune times or for prices other than at current market values or may elect not to sell such shares on the day that they are removed from the index, due to market conditions or otherwise.

The risks of owning an ETF generally reflect the risks of owning the underlying securities, although lack of liquidity in an ETF could result in it being more volatile and ETFs have management fees that increase their costs. The fund invests in securities of affiliated ETFs, which involves additional expenses that would not be present in a direct investment in such affiliated ETFs.

The ETFs in which the fund invests may invest in equity securities and the value of the fund's shares will fluctuate with changes in the value of these equity securities.

The ETFs in which the fund invests may invest in small capitalization and mid capitalization companies. Such companies may experience greater volatility than larger, more established companies.

Certain securities held by the underlying ETFs may be subject to credit risk, call risk, income risk, interest rate risk, prepayment risk, and extension risk. Credit risk is the risk that an issuer of a security will be unable or unwilling to make dividend, interest and/or principal payments when due and that the value of a security may decline as a result. Call risk is the risk that performance could be adversely impacted if an issuer calls higher-yielding debt instruments held by the fund. Income risk is the risk that income from the fund's portfolio could decline if interest rates fall. Interest rate risk is the risk that the value of fixed-income securities will decline because of rising market interest rates. Prepayment risk is the risk that the fund may not be able to reinvest proceeds received on terms as favorable as the prepaid security. Extension risk is the risk that, when interest rates rise, certain obligations will be paid off by the issuer more slowly than anticipated, causing the value of these securities to fall.

Underlying ETFs that invest in fixed income securities are subject to the risk that such securities generally trade "over-the-counter" and have no fixed market price.

High yield securities, or "junk" bonds, are subject to greater market fluctuations and risk of loss than securities with higher ratings, and therefore, are considered to be highly speculative.

Companies that issue bank loans tend to be highly leveraged and thus are more susceptible to the risks of interest deferral, default and/or bankruptcy. Senior floating rate loans are usually rated below investment grade but may also be unrated. As a result, the risks associated with these loans are similar to the risks of high-yield fixed income instruments.

Income from municipal bonds could be declared taxable and all or a portion of the fund's otherwise exempt interest dividends may be taxable to investors subject to the federal alternative minimum tax.

Convertible securities have characteristics of both equity and debt securities and, as a result, are exposed to certain additional risks.

Preferred securities combine some of the characteristics of both common stocks and bonds and are typically subordinated to bonds and other debt instruments in a company's capital structure, in terms of priority to corporate income, and therefore will be subject to greater credit risk than those debt instruments.

Mortgage-related securities, including mortgage-backed securities, are more susceptible to adverse economic, political or regulatory events that affect the value of real estate.

Certain ETFs in which the fund may invest have exposure to commodities through investments in commodity futures contracts and exchange-traded commodity linked instruments. The value of commodities instruments typically is based upon the price movements of a physical commodity or an economic variable linked to such price movements. The prices of commodities instruments may fluctuate quickly and dramatically and may not correlate to price movements in other asset classes. An active trading market may not exist for certain commodities. Commodities instruments are also subject to the risk that a counterparty to a commodities instrument may default on its obligations. Each of these factors and events could have a significant negative impact on the fund. Futures and futures-related products can be highly volatile.

The ETFs in which the fund invests may invest in securities of non-U.S. issuers which are subject to additional risks, including currency fluctuations, political risks, withholding, the lack of adequate financial information, and exchange control restrictions impacting non-U.S. issuers. These risks may be heightened for securities of companies located in, or with significant operations in, emerging market countries. The ETFs in which the fund invests may invest in depositary receipts which may be less liquid than the underlying shares in their primary trading market. Changes in currency exchange rates and the relative value of non-U.S. currencies may affect the value of the fund's investments and the value of the fund's shares.

The index employs a "momentum" style methodology that emphasizes selecting ETFs that have had higher recent price performance compared to other ETFs. Momentum can turn quickly and cause significant variation from other types of investments.

As the use of Internet technology has become more prevalent in the course of business, the fund has become more susceptible to potential operational risks through breaches in cyber security.

The fund currently has fewer assets than larger funds, and like other relatively new funds, large inflows and outflows may impact the fund's market exposure for limited periods of time.

The fund is subject to additional risks, as described in the fund's prospectus and summary prospectus, including, but not limited to, market maker risk, portfolio turnover risk and trading issues risk.

The United Kingdom’s Financial Conduct Authority, which regulates LIBOR, intends to cease making LIBOR available as a reference rate over a phase-out period that is currently expected to begin after the end of 2021 although the specific timing of the phase out of LIBOR continues to be discussed and negotiated across the industry and in various jurisdictions. The unavailability or replacement of LIBOR may affect the value, liquidity or return on certain fund investments and may result in costs incurred in connection with closing out positions and entering into new trades. Any potential effects of the transition away from LIBOR on the fund or on certain instruments in which the fund invests can be difficult to ascertain, and they may vary depending on a variety of factors and they could result in losses to the fund.

First Trust Advisors L.P. is registered as a commodity pool operator and commodity trading advisor and is also a member of the National Futures Association.

First Trust Advisors L.P. is the adviser to the fund. First Trust Advisors L.P. is an affiliate of First Trust Portfolios L.P., the fund's distributor.